Fix semantic highlighting of deprecated this or super constructor calls

Consider the following:
```groovy
class Type {
  Type() { this(null) }
  @Deprecated Type(String string) { ... }
}
```

Syntax highlighting of the deprecated constructor call "this(null)" currently covers the entire expression.  Only "this" or "super" in the case of a deprecated super class constructor should be highlighted (default style is strikethrough).